Trolley



Oct. 16,1923. 1,471,135 1 w. A. BARTLETT Filed March 1, 1923 7 Fig.1;

Fig. 3.

Patented Oct. 16,1923.

"j? iwzrtmm A. sanitation nLTIMonE, MARYLAND. 1; Q

" TROLLEY To hom concern): a

Be it known that I, W...m..-.. i.=s.s.

LETT, a citizenoft theUnited' States, residing" at Baltimore city Stateof Maryland, hate invented certain new and useful "Improvements inTrolleys,

wheel with'ithe wire, and thus prevent thef wheel fr'omfaccidentallyleaving the wire. f

r The object stated i... .i....1:by we of a combination and-arrange'ment of parts to be hereinafter described and claimed,iand inorder that the same may be better understood, reference is had to theaccompanying on whichthe trolley wheel 8 is journalled.

I tioned that their grooves, at.

The axle 7 has an oil duct 9 leading from one end thereof andterminatingat the side, so as to carry oil to the hub of the trolley wheel. 1

The trolle wheel8 has a grooved periphery as usua and intothegrooveextend guard rollers 10 for preventing the wheel fromaccidentally leaving the wire. Three equidistantly spaced rollersrareprovided, and each roller is mounted to. rotate freely on a stationaryshaft 11 carried by the trolley wheel and havin an oil duct 12 extend-VI ing from one end to the side, so as to carry oil to the hub of theroller.

In order to apply the rollers 10 to the trolley Wheel 8, thelatter hasits periphery formed with recesses 13 across which the shafts 11 extend,and in which recesses the rollers. are located. The rollers have agrooved periphery, and they are so posithe bottom,

. coincide with the bottom of thetrolley wheel groove, as' clearly shownin Fig. 4.- Thus," the wire, when notincontact with the bot v tom of thetrolleywheel groove, is in contact I- the' latter; extends into roller'son opposite sides thereof as shown at-14.: r v Each roller 10 hasitheside walls of its ckened at'diametrically' op osite points in such a waythat the; groove, is here reducedin width and thesaid thickened portionsare also formed with hanging side walls, as shown'at 15.,

The 'roller'jshafts 11 v are held stationaryof whichthe following is'aspecification. h

This invention relates to trolley wheels, and its object is to'pro'videa novel and improved means' for maintaining a constant rolling contactof the groove th' of? the roller, crowd proper position in the middle ofthegroove, and the continued'contact of the wheel with the wireis thusassured. Owing to the great speed at which. the wheel rotates, therollers rollers having grooved tions which overhang said 3 Applicationmea' March 1,4923.,ser a 'no. 522,013,

7' stationary. r g v When the wheel 8 is traveling alongthe trolleywire, it rotates',- and hence therollers 11, one after the other andsingly, arrive at with thebottomo fthe grooveof thejroller r r 1whichhappenstobe.at'the'top of the trolley To avo'id gaps between 1 therollers r Y and the bottomofthe 'trolley 'wheelgroove,

the groovescfthe s g Qvef- 7o "by'cOtt'er pins16,"and similar'means'lfar'e provided. for holding the trolleyj'wheelaxle I the top. tocome into contact with the wire, whereupon they also are made to rotate.If 1 the wheel showsany tendency-to jump the wire the overhanging sides15 of the roller groove will at once, by the rotary motion the wire backto its I come into'operative position, one Q-after the other, sorapidly,that the time intervals be- I tween such positions are too shortto permit the wheel to leave the wire, or the wire to slip off. thewheel. The guard rollers therefore effectually serve the purpose forwhich they have beendesigned, and at the same time they do not interferewith the removal of the trolley wheel from the wire when the trolleypole is swung down for this purpose.

1. The combination with a trolley-wheel having'a grooved periphery; of aplurality of guard rollers carried by. said wheel and journaledtransversely of its groove, said peripheries and the bottom of theroller grooves coinciding with the bottomlof the trolley-wheel groove,the

side walls of the, roller grooves having por- H grooves.

2. The combination with a trolley-wheel 7 having agrooved periphery; ofa plurality ofguard rollers carried by said wheel and journaledtransversely of its groove, said rollers havinggroovedperipheries andthe side walls of: the roller grooves havingportionsiwhich' overhangsaid grooi' es;

3. Thecombination with a trolley-wheel having a grooved periphery; of aplurality of guard rollers carried by said wheel and 1 adapted to comeinto contact witlrthe trolley wire one after the other and singly, saidrollers having grooved. peripheries, and said i roller grooves havingportions which are reduced in width,

' ;,4. .The combinationi with a trolleywheel having a grooved periphery;of a; pliiralit-y 7 having agrooyedperipher of a plurality o f guardrollerscarriedby saidwheel and duced in width. K I v V 5. Thecombination ,with a trolley-wheel I ,adaptedto come into contact withthetrolley wire one after the other-.andsingly, said rollers havinggrooved peripheries, and the bottomof the roller grooves coinciding withthe bottom of the trolley-wheel groove, the

side Walls of the roller grooves having portions which overhang saidgrooves.

' 6. The combination with a trolley-wheel having agrooved periphery; ofa plurality of guard rollers carried by said wheel and journaledtransversely of its groove, said rollers, having grooved peripheries andthe bottom ofthe roller grooves/coinciding with thebottoinof thetrolley-wheel groove, said roller'grooveshaving portions which arereduced in'fwidth. .1

7. The coinbination with trolley-wheel havinga grooved periphery; ofaplurality of guard rollers-carried'by said wheel and "journaledtransversely ofits groove, said rollers having grooved peripheries, andsaid roller grooves havlngportions whichjare reduced in Width;

, In testimonywhereof WILLIABIA. BARTLETT.-

